CN103307756A - Control system for water-coal-slurry heat-conducting oil boiler - Google Patents
Control system for water-coal-slurry heat-conducting oil boiler Download PDFInfo
- Publication number
- CN103307756A CN103307756A CN2013102186941A CN201310218694A CN103307756A CN 103307756 A CN103307756 A CN 103307756A CN 2013102186941 A CN2013102186941 A CN 2013102186941A CN 201310218694 A CN201310218694 A CN 201310218694A CN 103307756 A CN103307756 A CN 103307756A
- Authority
- CN
- China
- Prior art keywords
- boiler
- coal
- conduction oil
- slurry
- water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
Abstract
The invention belongs to the technical field of boiler control and particularly relates to a control system for a water-coal-slurry heat-conducting oil boiler. The control system comprises a PLC (Programmable Logic Controller) with a built-in control procedure; the signal acquisition input end of the PLC is connected with an oil outlet and oil return temperature detection module of heat-conducting oil, a boiler pressure detection device, a boiler liquid level detection device and a coal-water slurry combustion flame detection device; the control output end of the PLC is connected with an induced air regulator for controlling an induced draft fan, an air supply regulator for controlling an air feeder, a circulating oil pump controller, a slurry supply pump variable-frequency controller and an ignition device; and the PLC is also connected with a human-computer interface and an alarm interlock control device. The control system has the benefits that the water-coal-slurry boiler is controlled by the PLC to perform stable heating and accurately adjust the temperature; automatic temperature control and regulation is sensitive, the temperature regulation precision is high, and the heat supply is stable; and the outlet temperature of the heat-conducting oil boiler is controlled to be plus or minus 1 DEG C, so that the requirements of a polyester production enterprise and other enterprises are better satisfied.
Description
Technical field
The invention belongs to the Boiler Control field, be specifically related to a kind of water-coal-slurry heat conduction oil boiler furnace control system.
Background technology
In the tradition coal-burning boiler, coal fuel is solid-state combustion system, and coal water slurry boiler is revolutionary it is changed into the combustion system of high-pressure liquid atomizing spray combustion.The mode of this similar oil inflame has fully been integrated the Chemical Physics characteristics of liquid fuel, air, water various burning factors, has promoted increase substantially (the relatively coal-burning boiler) of fuel burn-off rate.According to liquid coal-based fuel combustion machine reason, the boiler whole system is optimized the design of resetting, both greatly improved the final efficiency of utilization of boiler, reduced again the gas emissions of major pollutants, thereby coal water slurry boiler has fully been realized again energy-conservation industrial efficiency of environmental protection.
Water-coal-slurry constant temperature heat conducting oil boiler is to adopt at present on the type of furnace basis of more and technology comparative maturity at home, improves in conjunction with the coal water slurry boiler characteristics.This boiler heating surface is large, has the characteristics such as compact conformation, outlet temperature is stable, the conduction oil circulation is reliable, thereby is subject to liking of users.
Most of boiler all needs accurate in real time control in the process of start and stop and operation, and relay logic control is also adopted in the control of most steam generator system.These type systematic automated procedures are very low, most of operation is still by manually finishing, can only process some switching value problems, analog quantity that can't treatment system is even control some switching values, its electric wiring is complicated, reliability is not high, the inconvenience maintenance, and every stove just needs a cover Control in the actual steam generator system control, so so that water-coal-slurry heat conduction oil boiler heater outlet temperature generally can only be controlled at ± about 5 ℃, can not satisfy the industries such as chemical fibre, plastics to the high request of boiler reliability.
Summary of the invention
The object of the present invention is to provide a kind of water-coal-slurry heat conduction oil boiler furnace control system, be intended to solve present front water-coal-slurry heat conduction oil boiler heater outlet temperature general control about ± 5 ℃, can not satisfy the industries such as chemical fibre, plastics to the technical problem of the high request of boiler reliability.
For achieving the above object, the present invention adopts following technical scheme:
A kind of water-coal-slurry heat conduction oil boiler furnace control system, comprise the PLC controller that is built-in with control program, the signals collecting input of described PLC controller is connected with the fuel-displaced of conduction oil and returning-oil temperature detection module, boiler pressure checkout gear, boiler liquid level checkout gear and cool water mixture burning flame detecting device; The control output end of described PLC controller connects the air inducing adjuster of control air-introduced machine, furnace pressure controller, oil circulating pump controller, slurry supply pump frequency-variable controller and the igniter of control pressure fan; Described PLC controller also is connected with man-machine interface and warning chain control device, and described warning chain control device is used for that burner hearth is flame-out, the conduction oil outlet temperature exceeds preset upper limit value, conduction oil pressure exceeds default lower limit, slurry supply pump fault, oil circulating pump fault, furnace temperature exceed default lower limit, the heat conduction oil mass is lower than to set and does not carry out alarm when limit value or burner hearth inner air pressure and preset pressure value are inconsistent and autostop is protected.
Described PLC controller connects host computer by communication interface.
Described communication interface is that RS232 turns 485 interfaces.
Described man-machine interface adopts touch-screen.
Described boiler liquid level checkout gear adopts water electrode.
Fuel-displaced and the returning-oil temperature detection module of described conduction oil adopts thermal resistance.
Described boiler pressure checkout gear adopts pressure sensor.
The present invention is by adopting able to programme coal water slurry boiler is controlled of PLC can carry out stable heating and accurate adjustment, the temperature automatic control and adjustment is sensitive, the adjustment precision is high, for thermally-stabilised, make the heat conduction oil boiler heater outlet temperature be controlled at ± 1 ℃, satisfied better the requirement of the enterprises such as production of polyester.
Description of drawings
Figure 1 shows that the structural representation of a kind of water-coal-slurry heat conduction oil boiler furnace control system that the embodiment of the invention provides.
The specific embodiment
Below, in conjunction with example substantive distinguishing features of the present invention and advantage are further described, but the present invention is not limited to listed embodiment.
Referring to shown in Figure 1, the figure shows the structure of a kind of water-coal-slurry heat conduction oil boiler furnace control system that the embodiment of the invention provides.For convenience of explanation, only show the part relevant with the embodiment of the invention.
See also Fig. 1, a kind of water-coal-slurry heat conduction oil boiler furnace control system, comprise the PLC controller that is built-in with control program, the signals collecting input of described PLC controller is connected with the fuel-displaced of conduction oil and returning-oil temperature detection module, boiler pressure checkout gear, boiler liquid level checkout gear and cool water mixture burning flame detecting device; The control output end of described PLC controller connects the air inducing adjuster of control air-introduced machine, furnace pressure controller, oil circulating pump device processed, slurry supply pump frequency-variable controller and the igniter of control pressure fan; Described PLC controller also is connected with man-machine interface and warning chain control device, and described warning chain control device is used for that burner hearth is flame-out, the conduction oil outlet temperature exceeds preset upper limit value, conduction oil pressure exceeds default lower limit, slurry supply pump fault, oil circulating pump fault, furnace temperature exceed default lower limit, the heat conduction oil mass is lower than to set and does not carry out alarm when limit value or burner hearth inner air pressure and preset pressure value are inconsistent and autostop is protected.
Described PLC controller connects host computer by communication interface.
Described communication interface is that RS232 turns 485 interfaces.
Described man-machine interface adopts touch-screen.
Described boiler liquid level checkout gear adopts water electrode.
Fuel-displaced and the returning-oil temperature detection module of described conduction oil adopts thermal resistance.
Described boiler pressure checkout gear adopts pressure sensor.
Because conduction oil pressure, conduction oil temperature, water-coal-slurry flow, air output, combustion chamber draft etc. and the closely-related parameter of burning, influence each other, have very close coupling, merge and form together the burns the fuzzy control loop, adopt the Intelligent PID Control strategy, make system have good regulation quality; The burner wind of water-coal-slurry/slurry, ratio requirement use PDI to regulate in the process of debugging according to combustion position, and the water-coal-slurry amount is followed the air quantity change, guarantee that the temperature of conduction oil outlet is controlled at ± 1 ℃.
In process that the conduction oil temperature is automatically adjusted, carry out: when the conduction oil temperature has reduction trend, add gently first air output, the rear water-coal-slurry amount that adds gently; When load shedding, first mild diminishing coal slurry amount, the rear air output that subtracts gently to guarantee having all the time enough and stably excess airs in adjustment process, makes the abundant smooth combustion of water-coal-slurry, realizes burning optimization.
The embodiment of the invention effectively overcomes the phenomenon that causes the combustion chamber draft fluctuation because of the air-introduced machine control lag by the feed-forward signal of the output of air-supply (amount) adjuster as air inducing (amount) adjuster.
The embodiment of the invention can also be carried out from motion tracking fire box temperature, keeps fire box temperature constant, avoids because of the too high coking of fire box temperature or warning blowing out; Bore temperature is crossed the flame-out or burning of low burning not to the utmost.
The operation of the control of control system of the present invention realizes:
First open successively air-introduced machine before the igniting, air blast carries out prepurge, ON cycle oil pump then, beginning oil drop fire when about fuel oil to 800 ℃, begins to throw slurry, finally realizes cool water mixture burning; By automatically (or the manually) adjusting to air-introduced machine, air blast, slurry supply pump frequency, follow the tracks of with the constant temperature of realizing heat medium temperature in the combustion process; Boiler stops to close simultaneously air blast after the combustion slurry, and air-introduced machine continues operation 120 seconds, takes away residual imflammable gas; Operating personnel will wash the residual slurry in the slurry rifle, keep slurry rifle cleaning, in order to for subsequent use; Close successively as required at last each auxiliary equipment.
Main feature and the function of control system of the present invention are as follows:
Control system of the present invention is by configuration cool water mixture burning flame detecting device, can realize the more effective burner hearth security interlocking protection that stops working to boiler; Slurry supply pump adopts frequency-variable controller to drive, and realizes that stock volume adopts frequency converter to regulate, and realizes the stepless stable regulation of boiler oil supply, Optimizing Combustion; Igniter adopts the high-energy flame igniter, eliminates the electrode ignition mode of traditional fuel-firing gas-firing burner, and reliability, ignition success rate obtain the lifting of essence; Adopt the PLC controller to add the control model of touch-screen, safe and reliable, automaticity is high; Friendly, lively, abundant man-machine interface; Igniting is reliable: begin igniting after oil circulating pump is opened, igniting continues autoshutdown after 2 seconds.If not success of for the first time igniting needed to continue the operation air-introduced machine 120 seconds, take away residual fuel gas, and then again light a fire by ignition procedure; Burning torch the time is advancing to the position in igniting, lights a fire completely to put back to original position by operating personnel, keeps its dry cleansing; The whitewashing quantitative change is regulated frequently, makes burning more abundant efficient;
The described control system of the embodiment of the invention is carried out sound and light alarm to following fault, locking stove in parallel, again open stove need eliminate reset after the fault can: the burner hearth fault of stopping working; Conduction oil temperature superelevation, conduction oil pressure superelevation; Frequency converter failure; Furnace temperature is excessively low; Compressed air is unusual.
The described control system of the embodiment of the invention also has in real time or historical data shows and statistical function, mainly comprises: data on-line analysis function, for host computer remote monitoring purposes; Data statistics, Presentation Function; Running status statistics, Presentation Function; Current, historical failure Presentation Function, by touch screen human-computer interface and host computer to realize.
In order better boiler to be control effectively, to realize monitoring camera being set when of the present invention in the boiler room, the operating condition at counterweight point device and position carries out Real Time Monitoring.Guarded region can comprise slurry supply pump, circular-pump, water-coal-slurry liquid level etc., makes operating personnel can understand in real time the ruuning situation of equipment.
The present invention can carry out stable heating and accurate adjustment by adopting the PLC touch-screen Automatic Control that adds able to programme, and the temperature automatic control and adjustment is sensitive, and the adjustment precision is high, for thermally-stabilised; In water-coal-slurry heat conduction oil boiler furnace control system, in addition, by being provided with bypass control system, in case the conduction oil excessive temperature can add by bypass the conduction oil of part low temperature, make the conduction oil temperature that finally enters use maintain a stable scope.The conduction oil tapping temperature that heats can be regulated automatically, and the final conduction oil outlet temperature fluctuation range of production of supplying with is at ± 1 ℃.
The above only is preferred embodiment of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (6)
1. water-coal-slurry heat conduction oil boiler furnace control system, it is characterized in that, comprise the PLC controller that is built-in with control program, the signals collecting input of described PLC controller is connected with the fuel-displaced of conduction oil and returning-oil temperature detection module, boiler pressure checkout gear, boiler liquid level checkout gear and cool water mixture burning flame detecting device; The control output end of described PLC controller connects the air inducing adjuster of control air-introduced machine, furnace pressure controller, oil circulating pump controller, slurry supply pump frequency-variable controller and the igniter of control pressure fan; Described PLC controller also is connected with man-machine interface and warning chain control device, and described warning chain control device is used for that burner hearth is flame-out, the conduction oil outlet temperature exceeds preset upper limit value, conduction oil pressure exceeds default lower limit, slurry supply pump fault, oil circulating pump fault, furnace temperature exceed default lower limit, the heat conduction oil mass is lower than to set and does not carry out alarm when limit value or burner hearth inner air pressure and preset pressure value are inconsistent and autostop is protected.
2. described water-coal-slurry heat conduction oil boiler furnace control system according to claim 1 is characterized in that, described PLC controller connects host computer by communication interface.
3. described water-coal-slurry heat conduction oil boiler furnace control system according to claim 2 is characterized in that, described communication interface is that RS232 turns 485 interfaces.
4. described water-coal-slurry heat conduction oil boiler furnace control system according to claim 1 is characterized in that, described man-machine interface adopts touch-screen.
5. described water-coal-slurry heat conduction oil boiler furnace control system according to claim 1 is characterized in that, described boiler liquid level checkout gear adopts water electrode.
6. described water-coal-slurry heat conduction oil boiler furnace control system according to claim 1 is characterized in that, the fuel-displaced and returning-oil temperature detection module of described conduction oil adopts thermal resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102186941A CN103307756A (en) | 2013-07-18 | 2013-07-18 | Control system for water-coal-slurry heat-conducting oil boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102186941A CN103307756A (en) | 2013-07-18 | 2013-07-18 | Control system for water-coal-slurry heat-conducting oil boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103307756A true CN103307756A (en) | 2013-09-18 |
Family
ID=49133259
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013102186941A Pending CN103307756A (en) | 2013-07-18 | 2013-07-18 | Control system for water-coal-slurry heat-conducting oil boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103307756A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105318554A (en) * | 2014-09-02 | 2016-02-10 | 刘艳琴 | Conduction oil boiler control system and method |
| CN107192258A (en) * | 2017-06-07 | 2017-09-22 | 宁夏金丝路新能源科技有限公司 | Mineral hot furnace safety in production early warning and emergency stopping system |
| CN108398901A (en) * | 2018-02-27 | 2018-08-14 | 常熟理工学院 | Intelligent heating furnace control system and its control method |
| CN109185916A (en) * | 2018-08-28 | 2019-01-11 | 苏州新吉利奥自动化控制有限公司 | A kind of burner hearth extinguishing detecting device and its detection method |
| CN109917737A (en) * | 2019-01-21 | 2019-06-21 | 谢永平 | A kind of fuel oil heat-conducting oil furnace electrical management system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002045644A (en) * | 2000-08-07 | 2002-02-12 | Hitachi Zosen Corp | Semi-dry type desulfurization/dehydrochlorination method for exhaust gas |
| CN201593870U (en) * | 2010-01-27 | 2010-09-29 | 连云港杰瑞深软科技有限公司 | Boiler heating control system |
| CN201672688U (en) * | 2010-05-25 | 2010-12-15 | 哈尔滨市东龙自动化技术有限责任公司 | Heating boiler controller |
| CN201688574U (en) * | 2010-04-18 | 2010-12-29 | 山东圣威新能源有限公司 | Electric control device of frequency-conversion temperature-control coal-fired heat-conducting oil boiler |
| CN202267226U (en) * | 2011-09-30 | 2012-06-06 | 上海星伦工业自动化技术有限公司 | Automatic control system of coal burning boiler |
-
2013
- 2013-07-18 CN CN2013102186941A patent/CN103307756A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002045644A (en) * | 2000-08-07 | 2002-02-12 | Hitachi Zosen Corp | Semi-dry type desulfurization/dehydrochlorination method for exhaust gas |
| CN201593870U (en) * | 2010-01-27 | 2010-09-29 | 连云港杰瑞深软科技有限公司 | Boiler heating control system |
| CN201688574U (en) * | 2010-04-18 | 2010-12-29 | 山东圣威新能源有限公司 | Electric control device of frequency-conversion temperature-control coal-fired heat-conducting oil boiler |
| CN201672688U (en) * | 2010-05-25 | 2010-12-15 | 哈尔滨市东龙自动化技术有限责任公司 | Heating boiler controller |
| CN202267226U (en) * | 2011-09-30 | 2012-06-06 | 上海星伦工业自动化技术有限公司 | Automatic control system of coal burning boiler |
Non-Patent Citations (1)
| Title |
|---|
| 郑威: "水煤浆导热油锅炉监控系统研究开发", 《中国优秀硕士学位论文全文数据库 信息科技辑》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105318554A (en) * | 2014-09-02 | 2016-02-10 | 刘艳琴 | Conduction oil boiler control system and method |
| CN107192258A (en) * | 2017-06-07 | 2017-09-22 | 宁夏金丝路新能源科技有限公司 | Mineral hot furnace safety in production early warning and emergency stopping system |
| CN107192258B (en) * | 2017-06-07 | 2018-11-23 | 宁夏金丝路新能源科技有限公司 | Mineral hot furnace safety in production early warning and emergency stopping system |
| CN108398901A (en) * | 2018-02-27 | 2018-08-14 | 常熟理工学院 | Intelligent heating furnace control system and its control method |
| CN109185916A (en) * | 2018-08-28 | 2019-01-11 | 苏州新吉利奥自动化控制有限公司 | A kind of burner hearth extinguishing detecting device and its detection method |
| CN109917737A (en) * | 2019-01-21 | 2019-06-21 | 谢永平 | A kind of fuel oil heat-conducting oil furnace electrical management system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101576314B (en) | Ignition control system of tube furnace | |
| CN103307756A (en) | Control system for water-coal-slurry heat-conducting oil boiler | |
| CN100467954C (en) | Petroleum coking-slurry burning control system | |
| CN101576313B (en) | Method for controlling automatic ignition of tube furnace | |
| CN101900316B (en) | Biomass boiler control system | |
| CN102748765B (en) | Incineration furnace grate and charging gear control method, device and system | |
| CN102287817A (en) | Burning-control system for oil burner | |
| CN110701620A (en) | Garbage incinerator water spray cooling system and automatic control method thereof | |
| CN102679356A (en) | Automatic control mode and device of premixing type secondary burner | |
| CN201748397U (en) | Biomass boiler control system | |
| CN202216277U (en) | Automatic control device for a combustor type industrial boiler | |
| CN103453550A (en) | Automatic temperature regulation control method and system for coal-burning boiler | |
| CN202470021U (en) | Intelligent control device of steam boiler system | |
| CN208154444U (en) | A kind of gas fired-boiler is for thermal control system | |
| CN202902291U (en) | Device and system for controlling three-driving inverse push type incinerator grate and feeding device | |
| CN208253586U (en) | Hot air type Gas Direct-fired burner | |
| CN204478024U (en) | Oil-based fuel and alcohol-group fuel co-fire device | |
| CN103438419A (en) | Method for starting coal pulverizing system before running of 1,000MW first-stage large bypass system unit | |
| CN105782970A (en) | Alcohol-based fuel combustor | |
| CN210979863U (en) | Spray gun for automatic water spraying and cooling control system of garbage incinerator | |
| CN108105829A (en) | Biomass boiler intelligent heating device | |
| CN105114960B (en) | A kind of method of garbage incinerator thorax Stress control | |
| CN202056869U (en) | Pulverized coal burner | |
| CN204166354U (en) | For the automatic control system of middle-size and small-size coal dust industrial hot water boiler | |
| CN102840585B (en) | Three-driving inverse push type incinerator grate and feeding device control method, device and system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130918 |